RS485 Interface Converter

RS485 Interface ConverterEnd of Life

The V35/485-1 Interface Converter provides conversion between V.35 and RS-485 standard interfaces. The V.35 interface connection is via a supplied adapter cable and the unit's DB-25 female connector, while the RS-485 side's connection is via a five screw terminal block. The V35/485-1 converters circuitry provides a high degree of electrical isolation between the V.35 and RS-485 sides. The V.35 side may operate as DTE or DCE, switch selectable, has provisions for establishing hardware flow control, and has LEDs to indicate data transmission and reception. The RS-485 side may operate in either two wire half duplex or four wire half full duplex.

RS485 Interface Converter schematic


  • Electrically converts SYNC V.35 to RS-485
  • RS-485; 2 or 4 wire, Half or Full Duplex
  • V.35 handshaking; DTR/DSR, RTS/CTS or Auto
  • 2500V electrical isolation minimum
  • DTE/DCE switch selectable
  • Easy to configure
  • External DC power required


Data rate: Up to 2Mbps
Connector: V.35: DB25F with adapter cable, RS485: 5 screw terminals block
Indications: LEDs (TX/RX on 485 side and TD/RD on V.35 side)
Power Input: DC 9V in via AC adapter
Power Consumption: < 6W
Dimensions: 140 x 80 x25mm (D x W x H)
Weight: 150g
Temperature: 0°C ~ 50°C (Operating), -10°C ~ 70°C (Storage)
Humidity: 10~90% non-condensing

Live Demo of FRM220 Chassis

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